This has nothing to do with the Amiga, but shameless plug for a cool in-browser ray-tracer we made for a school project http://camargo.github.io/tracejs/#/ Rendering times become exponentially slower with more objects in the scene (100% native Javascript, hence 0 hardware acceleration) but it's fun to play with if you're in the mood!
https://www.shadertoy.com/view/XdfXDB
(There's no geometry in that scene --- the shader is run for each pixel independently!)